Mity CPU Platforms » MitySOM-5CSX Altera Cyclone V

05/21/2021

DV 07:12 PM Software Development: RE: Ethernet on MitySoM

Hi Jonas,
The CSEL switches shouldn't have an effect on the ethernet interface, they are more used during the early boot process.
It sounds to me like there is a hardware defect with the development kit. Someone will contact you v... Daniel Vincelette

JM 04:27 PM Software Development: RE: Ethernet on MitySoM

I also tried it at home now (with your image) and I can reproduce the same behavior. So it points directly towards the hardware. Are there some hardware configurations, which might affect the behavior, e.g. the CSEL switches?
Regards ... Jonas Mair

JM 03:24 PM Software Development: RE: Ethernet on MitySoM

Hi Dan,
my plan was to take the board home over the weekend to test out a different router, in the office i tested with 2 different cables and 2 different router plugs, which worked fine for 100Mbps at least (only confirmed it with ... Jonas Mair

DV 02:37 PM Software Development: RE: Ethernet on MitySoM

Hi Jonas,
Thank you for providing the serial numbers. I've double checked our production logs and that development kit did link up at 1Gbps speeds and was able to send and receive ethernet packets before shipping out.
Can you boot ... Daniel Vincelette

JM 08:41 AM Software Development: RE: Ethernet on MitySoM

Sure,
Baseboard: 1701 8998
SoM: 1803 5616
It's an 5CSX-H6-42A-RC Module
Regards
Jonas Jonas Mair

05/20/2021

DV 07:57 PM Software Development: RE: Ethernet on MitySoM

Hi Jonas,
If you are also witnessing this issue with our stock SD card image then it sounds like there could be a hardware problem with dev kit. Could you provide me the serial number of both the SOM and baseboard?
The serial numbe... Daniel Vincelette

JM 04:59 PM Software Development: RE: Ethernet on MitySoM

Okay an update:
Skews are set correctly, I read them out with [[ https://github.com/wkz/phytool ]] and could confirm the values set in the device tree after kernel boot.
I measured the clock GTX_CLK, supplied from the MAC to the PHY.... Jonas Mair

05/19/2021

JM 05:23 PM Software Development: RE: Ethernet on MitySoM

Hey Dan,
I tried the device tree configurations you mentioned and also the generic ones adapted to my hardware from
https://elixir.bootlin.com/linux/v5.8.18/source/Documentation/devicetree/bindings/net
(also your example is listed th... Jonas Mair

05/17/2021

DV 07:08 PM Software Development: RE: Ethernet on MitySoM

Hi Jonas,
Looking at the device-tree binding doc for the phy it looks like if you specify the phy address you need to put the skews in their own phy node instead of in the MAC node. Take a look at the example here: https://support.cri... Daniel Vincelette

JM 10:05 AM Software Development: RE: Ethernet on MitySoM

Hey Dan,
I checked the kernel configuration in menuconfig and directly in the .config of my kernel and the config was enabled.
Also it seems like the device is detected properly and the correct driver is chosen: Jonas Mair